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Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite

A series of phenol-formaldehyde-polyethylene glycol polyether polyols (PF-PEGs) were synthesized through the condensation polymerization and etherification of phenol, formaldehyde, and poly(ethylene glycol) (PEG) under alkaline conditions and subsequently reacted with 1,6-hexamethylene diisocyanate...

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Autores principales: Liu, Juan, Chen, RiQing, Wang, ChunPeng, Zhao, YongJun, Chu, FuXiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6925240/
https://www.ncbi.nlm.nih.gov/pubmed/31862966
http://dx.doi.org/10.1038/s41598-019-56147-x
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author Liu, Juan
Chen, RiQing
Wang, ChunPeng
Zhao, YongJun
Chu, FuXiang
author_facet Liu, Juan
Chen, RiQing
Wang, ChunPeng
Zhao, YongJun
Chu, FuXiang
author_sort Liu, Juan
collection PubMed
description A series of phenol-formaldehyde-polyethylene glycol polyether polyols (PF-PEGs) were synthesized through the condensation polymerization and etherification of phenol, formaldehyde, and poly(ethylene glycol) (PEG) under alkaline conditions and subsequently reacted with 1,6-hexamethylene diisocyanate to obtain polyurethane (PU) films using acetone as solvents. The influence of phenol and formaldehyde to PEG mass ratio ((P + F)/PEG) on the hydroxyl number of PF-PEGs and mechanical properties, thermal stabilities, crystallization behaviors, as well as microstructure of polyurethane composite films were studied using chemical analysis, mechanical tests, thermogravimetric analyses (TGA), dynamic mechanical analyses (DMA), X-ray diffraction (XRD), scanning and transmission electron microscopies (SEM and TEM), respectively. Results demonstrated that PF-PEGs with (P + F)/PEG of 50/50 had the highest hydroxyl number of 323 mg K(OH)/g. The incorporation of phenol and formaldehyde into PEG improved the mechanical properties of polyurethane films, glass transition temperature (T(g)), and thermal properties but resulted in the brittleness characteristic of the composite films and low crystallization properties. Moreover, the synthesis mechanism of PF-PEGs polyurethane composite films was revealed, which would provide a theoretical base for the preparation of the rigid polyurethane foams based on phenolic resins.
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spelling pubmed-69252402019-12-24 Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite Liu, Juan Chen, RiQing Wang, ChunPeng Zhao, YongJun Chu, FuXiang Sci Rep Article A series of phenol-formaldehyde-polyethylene glycol polyether polyols (PF-PEGs) were synthesized through the condensation polymerization and etherification of phenol, formaldehyde, and poly(ethylene glycol) (PEG) under alkaline conditions and subsequently reacted with 1,6-hexamethylene diisocyanate to obtain polyurethane (PU) films using acetone as solvents. The influence of phenol and formaldehyde to PEG mass ratio ((P + F)/PEG) on the hydroxyl number of PF-PEGs and mechanical properties, thermal stabilities, crystallization behaviors, as well as microstructure of polyurethane composite films were studied using chemical analysis, mechanical tests, thermogravimetric analyses (TGA), dynamic mechanical analyses (DMA), X-ray diffraction (XRD), scanning and transmission electron microscopies (SEM and TEM), respectively. Results demonstrated that PF-PEGs with (P + F)/PEG of 50/50 had the highest hydroxyl number of 323 mg K(OH)/g. The incorporation of phenol and formaldehyde into PEG improved the mechanical properties of polyurethane films, glass transition temperature (T(g)), and thermal properties but resulted in the brittleness characteristic of the composite films and low crystallization properties. Moreover, the synthesis mechanism of PF-PEGs polyurethane composite films was revealed, which would provide a theoretical base for the preparation of the rigid polyurethane foams based on phenolic resins. Nature Publishing Group UK 2019-12-20 /pmc/articles/PMC6925240/ /pubmed/31862966 http://dx.doi.org/10.1038/s41598-019-56147-x Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liu, Juan
Chen, RiQing
Wang, ChunPeng
Zhao, YongJun
Chu, FuXiang
Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
title Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
title_full Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
title_fullStr Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
title_full_unstemmed Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
title_short Synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
title_sort synthesis and characterization of polyethylene glycol-phenol-formaldehyde based polyurethane composite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6925240/
https://www.ncbi.nlm.nih.gov/pubmed/31862966
http://dx.doi.org/10.1038/s41598-019-56147-x
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